Mounting for magneto igniters



Feb. 27, 1923. 1,446,442

A. R. BAKER MOUNTING FOR MAGNETO IGNITERS Filed Oct. so, 1919 "MQKBTB I 1732711112 1?. BAKER,

Patented Feb. 27, 1923.

UNITED STATES,

PAIENT OFFICE.

ARTHUR R. BAKER, OF INDIANAPOLIS, INDIANA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO CHARLES MGCUTCHEN, OF INDIANAPOLIS, INDIANA. I

MOUNTING FOR MAGNETO IGNITERS.

Application filed October 30, 1919.

To ii /mm if may concern:

lie it known that I, ARTHUR R. BAKER, a citizen of the United States, residing Indianapolis, in the county of Marion and State of Indiana, have invented new and useful, Mountings for Magneto Igniters, of which the following is a specification.

It is the object of my invention to improve the mounting of the igniter contacts and the oscillating ignition magneto of an internal combustion engine, more particularly in connection. with the type of mount ing shown in my prior Patent No. 1,306,134.,

granted June 10, 1919; to make it possible to make the supporting arms for the magnote of steel or other strong and malleable metal while making the supporting plug for igniter contacts of cast iron, whereby greater strength and freedom from breakage may be secured for the former while the qualities of cast iron may be obtained for the heat-exposed igniter plug in wh ch the fixed and especially the movable igniter contacts are mounted; to insure the proper relative positioning of the two parts of the mounting when they are together. and es pecially when they are in place on the engine; to make it possible to cast the plug carrying the igniter contacts with its flange horizontal. whereby blow holes which are otherwise found frequently to develop are avoided; to lessen the expense of maintenance. by making possible the replacement of one part of the mounting in case it fails without requiring that a complete new mounting he provided.

The accompanying drawing illustrates my invention: Fig. 1 is a perspective view of my improved two-part bracket. and the igniter contacts associated therewith. indicating the associated magneto in dotted lines; Fig. 2 is a horizontal section through the bracket, looking from the bottom. showing the ignite! contacts. but with the associated magneto omitted and with its supporting arms partly broken away; Fig. 3 is a front elevation of the igniter plug and the associated igniter contacts, with the magneto-supporting part removed; Fig. 4 is a perspective view of the magneto-supporting part alone; and Fig. 5 is a perspective View similar to Fig. 4, but showing a modification in which the magneto is sup ported on 'a. shelf.

Serial No. 334,443.

My improved bracket comprises two parts A and B. for carrying the igniter contacts and the magneto respectively. The part A is preferahtv made of cast iron, while the part B is of some strong malleable metal, SlKll as a casting or stamping of steel or manganese bronze.

The part A, or iguiterplug part, comprises a bolt flange 10 with the usual bolt cars. from one face of which flange usually projects a plug ll. which extends into the engine cylinder and carries the fixed and movable igniter contacts 12 and 13. The fixed contact is suitably connected by wire 14: to one terminal of the magneto. (the other terminal usually being grounded,) such wire conveniently passing through a suitable hole in the flange 10 as is clear from Fig. 3. The flange 10 is also preferably provided on the opposite face from the plug ll. with a central boss 15. though this is not essential. The details of the ig niter contacts are also not essential to the present invention. This part A is preferably made of cast iron, and may be cast with the flange 10 horizontal and the plug l1. downward; this eliminates certain blow holes which are found frequently to occur when the plug is cast with the flange in a vertical position. as is necessary in the onepiece bracket shown in my aforesaid patent. lt is desirable to have the part A of on iron. both because of the heat to which it is subjected and because of the better bearing qualities of cast iron than steel in the bearing surfaces on which the steel shaft of the movable igniter contact 13 moves.

The part B has a central supporting flange from which projects a magneto-supporting portion. In the preferred form of my invention such portion comprises two projecting arms 21 and 22 on which the oscillating magneto 23 and its returning springs 24 are mounted in the same manner as they are mounted in the construction set forth in my aforesaid Patent No. 1,306,- 134; this form is shown in Figs. 1 to 4. In the modification shown in Fig. 5 the magneto-supporting portion in a shelf 30, on which the magneto rests. The flange 20 in either case is provided with a central opening 25 which loosely receives the boss 15; but the fit of such boss in such hole is I to preferably very loose so that no positioning is obtained by it. In order to obtain the proper relative positioning oi the parts i and B, each of the to bolt ears of the flen e 10 of the port A has nressec into it a tube or bushing 26, preferably of steel; tiis tube or bushing receives the studs or bolts 27 by which the Whole device nttached to the engine. The tubes 26 project outii'erd beyond the outer face of the things l0, and the flange 20 is pro ided with holes 28 Winch register with and lit over projecting ends of the tube :26 When the two Darts I; and B are put together as shown L11 l and 52. The lit of the tubes 26 in the bolt ears of one llfll1t3--Sl10lYn 21s tl Hungel(x is preterabl i a tight press I? The fit of the tubes 26 in the other "long shown the flange ji it'll-provides enough clearance to prevent binding: two psi-ts so that by the tubes 26 and he 28 the two parts it and B are held in proper relative position'when they are put together. This clearance is greatly eizziggei'oted in Fig. 2. in order to show that the tulgies 36 are tight in the other flange, for such cl "liiiltit: is ordinarily but two or t llSt. thou nit. of an inch, which is too mil to show on the drawing. The projeeting portions of the tube 26 which project into the holes 2 3 are preferably slightly shorter than the thickness of the flange 20, so that the hear is 01 the bolts the nuts on the studs 27 by which the device is attached to the engine will bear against the face of the Plunge :30 and clamp the flanges and 10 togetl 21 and the flange 10 against the engine cylinder 29.

By removing these nuts or bolts the part B may be removed alone, or both ports i and B may be removed. In case of brooks" or weer of either port at new part may hes stitutcd tor the broken or Worn part if, out requiring it neu ort for the other. Usually it is the part A. which will we .7 out, and s new port A may be carried 1 stock at small expense. llhen the two pit" ll'G put back on the engine, their prone. relative positioning is insured by the lit ot the tubes 26 in the holes 28. This same lit permits the two parts to be put together in proper relation at a. Worlnnuns be ich to permit their relative adjustment when it is necessary; this may be done Without bolts, for the proper relative positioning of the two parts is not dependent on the bolts.

I claim as my iiwentiont 1. A. supporting brac re tor oscillating megnetos and igniter contacts. compriiin pm i hiter-plug pa t for cnrr cont: end a. mug;- rnnged to bear against the i 1 said two parts having rcgisterii so that the s we studs or belts may be i for attaching both parts to the or hie. s 1,1 po ts icing provided with int ariitting'" projections and opening for positioning the two par-ts relatively to (itfll (itiktl.

support 1;; bracket os-riihir' inegnetos and igniter coi'itzu -r's couiprtn an igniter-plug part for c'arrying the contacts, and a. nuigneto-supporting yer? zirto beer against the igniter-o g; part )arts l'mving registering be t holes t the 221116 studs or bolts may be l i. g ii.

parts being provided with inter-fitting project-i :1 :nd openings for positioning the t" relative y to each other independe ohs or sti l sup iorting bracketior oscillating and igniter contacts. C(XfllPllSllltl on igniter-phur part for carryingthe ignii'er contracts, in; gnetosupporting port 211- rengred o: e 'oinst t is i nitef-plugg; port. said "o 1 'ing regis bolt holes ill: some :i'llClS or bolts may be used so the. l for sttecl 1 both parts to the engine, bolt holes l 51' V )Qlllg lower then he bol studs wind the; mom i. and r es ii the bolt 1101 s of one part ind projec ill the bolt holes t the other. t two parts reloti to each other. said tubes being o't pronei to receive the attachinn; bolts or sti In Witness my hand :1 V i v day of October A.

x'e hereunto set ianzn this EZTt thousand 1 inc D. hundred and nineteen.

ARTHUR BAKER.

or zittzichin both parts to the engine; s: 1 'l 

